Jon takes in a weak stray cat, prompting Garfield to become envious of all of the attention the guest is receiving. With the new cat taking advantage of Jon's hospitality, Garfield sets out to make him leave.
Orson fires Roy after he insults all of the animals with mean jokes. In an attempt to bring back Roy, the animals suggest hiring Wade’s cousin Fred Duck, whose behavior is worse than Roy's.
Garfield purchases a lottery ticket at the supermarket which proves to be a winner. He, Jon, and Odie enjoy living the high life, including having their new mansion explored on a television program about wealthy people.
After Garfield disrupts a picnic because of his desire to nap, Jon scolds him for his laziness. Garfield then dreams about sleeping for twenty years and awakening on a futuristic Earth, which is invaded by aliens that look exactly like Garfield.
Roy plays a prank on Wade, who is worried about the law of gravity (or "grabbity", as Roy pronounces it) getting repealed.
It is Jon's birthday, and his mother has sent him a batch of his favorite cookies. Jon tells the mailman about the many times Garfield has stolen the sweets on past birthdays, and vows to enjoy them for himself this year.
Jon visits New York City on a trip, unaware that Garfield has snuck along. When Garfield discovers that Jon's date is a pickpocket, he tries to protect his owner wherever he goes.
Orson narrates a previous event about Sheldon and how he was mistaken for a mother turtle's child.
When Nermal comes over for a visit, Garfield is forced to entertain him, and narrates the story of Hansel and Gretel. Nermal protests various elements of the story, and Garfield must change them to satisfy him.
Jon, Garfield, and Odie are forced to stay in an old and abandoned hotel after the car breaks down in front of it. Jon plays a prank on Garfield and Odie by telling them that a "sludge monster" lurks in the hotel.
Wade becomes superstitious after reading his paper fortunes from Chinese fortune cookies. Roy makes a fake fortune and then stages its events to scare Wade, only for his own fortune to start coming true.
Garfield combats a hot July day by "thinking cool," leading him to set up Christmas decorations. Jon, Odie, and the entire town soon follow suit, prompting a summer holiday.
After Garfield and Odie destroy all of Jon's ferns, he heads to a greenhouse to purchase a new one. The new fern tries to eat everyone in the house, and Garfield must get rid of it.
Bo wants a record player, and Orson sets out to find him one as a gift. A chain reaction is put in effect after the giver wants something in return.
Believing that his date is already going out with a different man, Jon swears off women and tells Garfield to hide his little black book of phone numbers. When he changes his mind, Garfield holds to his promise and refuses to reveal his hiding place.
Garfield, hosting a tour of the National Cat Museum, narrates a story about a prehistoric cat. The cat was determined to cross a giant lake to reach the fabled "lasagna trees" that grew on a faraway island.
Orson reads a spy novel, and his imagination turns him into "Double-oh-Orson" in a parody of the James Bond film Thunderball. On his adventure, Double-oh-Orson combats the villainous "Pinfeather" (Roy) and tries to stop the top-secret highly-experimental thermonuclear exploding grelbin device before it is too late.
Garfield takes revenge on a stereotypical TV health/fitness show host when his influence on Jon becomes a threat to Garfield's lifestyle.
When Binky the Clown's show is cancelled due to low ratings, he eventually gets a new job as a handyman. This coincides with Jon wanting repairs done around the home, which leads to Binky redecorating the whole house.
The farm animals put on a talent show, with Wade having stage fright. When Orson also gets it when his brothers attend the show, it is up to Wade to save the day.
Nermal runs away after one of Garfield's pranks. Odie is upset and nags Garfield into finding Nermal, which he eventually sets out to do.
When Jon buys a new TV satellite dish, he cautions Garfield about getting lasagna on its surface. After Garfield neglects to heed the warning, he is transported into various TV shows, leaving Odie to try to get him out.
Orson is tired, and his friends and the Sandman's substitute try to make Orson go to sleep.
When Jon and Liz's date is interrupted by a thug, Jon resolves to take martial arts classes and become an "urban samurai" to build confidence. Garfield, knowing that his hapless owner will get into trouble, imagines himself as "Yojumbo," a samurai warrior, to protect him.
After being assigned to buy groceries, Odie is cheated out of his money by an alley cat, who trades an old sock for Odie's grocery money. Jon is angry and demands that Odie get the money back.
After pulling several pranks on Orson, Roy fears that Orson will pull a revenge prank on him, despite Orson saying that he will not.
Garfield accepts a job as a movie stunt double.
Jon takes Garfield to a dude ranch called "Polecat Flats", where Garfield learns about ranch life while wondering what a polecat is (a skunk).
Orson tells Booker and Sheldon the myth of Hercules. Roy tells him his brothers are coming to visit and then Orson falls asleep, wondering what being Hercules would be like.
Garfield is framed for destruction by the son of Jon's cousin.